Machine for making valved paper bags



M. C. ROSE. MACHINE FOR MAKING VALVED PAPER BAGS.

APPLICATION FILED JULY I4, I9I9.

Patented Aug. 31, 1920.

.UNITED STATES PATEuT onion.)

MAXWELL C. ROSE, OF CLEVELAND, OHIO, ABSIGNOB TO THE CLEVELAND-AKRON BAG00., OF CLEVELAND, OHIO, A'CORPOBATION OF OHIO.

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To all whom it may concern:

Be it known that I, MAXWELL C. Rosn, citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Machines for MakingValved Paper Bags, of which the' following is a specification.

Th1s invention relates to a machine for making valved paper bags, andthe object feed, form and finish the bag step by step without cessation.or interruption in the movement of the bag through the machine.

The paper bag or sack made by the present machine is designed to berelativelylarge and the stock from which it is made relatively tough andstrong so that the bag or sack is adapted to withstand hard usage andcarry and hold a considerable amount of granular or powdered material.Further, the bag or sack is sealed and closed at both ends excep atonecorner where a simple foldprovi esa valved inlet through which tlfimaterial is fed or introduced until the bag is substantially full. Whenfilled, the bag is inverted and the weight and pressure of the contentscollapse and close the folded walls of the inlet opening at the cornerof the bag. The present machine takes a tube or bag-in its flat stateand by successive stages forms a corner valve and closes one end of thebag and discharges the completed bag in a fiat state ready for fillingoperations.

'In the drawings accompanying this ap' plication, Figure 1 is a top planview showing the essential features of my invention and Fig. 2 is a sideelevation thereof. Figs. 3 to 8, inclusive, are perspective views of thebag or sack in its various stages of formation from the time it entersthe machine until completed-and discharged.

Specification of Letter: Iatent. I Patented Aug, 31, 1920.

Application filed July 14, 1918. Serial No. 310,811.

, applied to one of these shafts by between a pair of opposed endlessbelts or conveyers 4 and 5 respectively. These conveyers extend thelength of the machine and are mounted or carried by suitable rollers orpulleys 6 supported on shaft 7. Power is gears 8, and the coactingmechanisms hereinafter described are also driven through the samesourceof power transmitted to suitable drive shafts, gears, belts or chains.

The entry of bag S into the bite of the conveyors is temporarily checkedby a stop plate 9 which is adaptecLto be raised and lowered by a cam 10on'the shaft 7 on the lower conveyer pulley atgthe-z'receiving end ofthe machine. The instant stop plate 9 is lowered the bag or sack S isfed forward and its open end or mouth passes beneath a hollow head 11having a perforated inclined bottom 12 against which the top ply of theopen end of the bag is adapted to be drawn by vacuum or suction createdwithin the head by a pump or fan connected to pipe 14. Thus,while thebag is moving forward the opposite plies at the open end of the bag arespread apart, especially at the advancing edge of the bag and at thecorner so that a vertical wall 15 (Fig. 4) is formed at the cornerdirectly in line with a rotating finger 16 which is driven by bevelgears 17 and belt 18 from motor M. As the bag moves forward the finger16 is timed to strike wall 15 and tuck a triangular corner 19 of the bagbetween the upper and lower plies of the bag substantially as shown inFig. 5, and before the finger has again comleted a rotative movement thetucked bag s passed onward beneath a creasing disk .20 which is adaptedto produce a crease on a straight line parallel with the end of the bagacross the corner folds and the two plies so that the end of the bag maythereafter be easily folded back and pasted flat upon the upper face ofthe bag.

However, before this final pasting operation occursthe two plies orsides of the bag must have paste applied upon the inside of the openends so that this open end may be first pasted shut. This isaccomplished immediately after the bag has passed creasing disk 20during the interval of its passage beneath a second vacuum or suctionhead 21 which separates the plies at the open end of the bag as the'bagtravels forward so that an oscillatory finger or spout 22 may applypaste to the inside face on the bottom ply of the bag. Thus, as the bagadvances and opens where tucked an entrance is afforded for the spout'or finger 22 and the paste is conveyed from receptacle 23 through thehollow stem of the spout to the inner ply of the bag, and when the rearfolded edge 24 of the bag engages the spout or finger 22 said finger orspout will turn on its pivot or in its bearings under the tension of aspring 25 connected to an arm 26 on the spout, thereby permitting thebag to pass onward. As soon as the bagpasses beyond this point thefinger or spout is released and the spring carries the spout. into itsoriginal position to operate in the same manner on. the next orsucceeding bag.

Following this inner pasting operation the next step' is to apply pasteon the upper side of the bag between the creased line and the outer endof the bag. VThis is accomplished" by a paste wheel 27 located withinand at the bottom of the paste receptacle 23 at the front of spoutmember 22 and this paste wheel 27 also serves to press the two pliestogether opposite the paste previously applied between the plies. Thenas the bag advances, the end which has been creased and pasted enters afolding device comprising an open-sided tube 28 having an enlargedflaring entrance and sloping walls terminating in a narrow elongatedoutlet, whereby the pasted end of the bag is curled upwardly and foldedback anddown upon the top side of the bag the full width of the bag onthe line of the crease made by creasing disk 20 so that the pastedportion will be folded upon itself and the straight end of the bagpermanently closed as this folded portion passes between a pair ofpresser rollers 34 before being discharged from the conveyer at thedischarge end of the machine. The completed bag is discharged in a flatstate, and is closed at both ends except at one corner where the fillingentrance and valvular folds are formed by the operations hereindescribed.

The present disclosure represents a simple form of machine, wherebyvalved paper bags may be produced in a continuous manner withexceptional economy in operation, but the details of construction of themachine may be considerably modified without departing from the spiritand scope of the invention as hereinafter claimed.

What I claim is:

1. In a machine for making valved bags, means adapted to convey anopen-ended tube in a given direction with its greater length at rightangles to the line of travel, means adapted to spread the plies of thetube apart at one corner and means to tuck said corner inwardly betweenthe sides of the tube during a forward travel of the tube.

g 2. A machinefor making paper bags, comprising means adapted to feed anopen bag with onelongitudinal edge in advance of the body of the bag,means adapted to tuck one corner of the open ba between the sides of thebag and,means a apted to fold the extremity of the bag where tucked uponthe side of the bag.

means for conveying a bag with one end spread open and with onelongitudinal edge in an advance position, means for tucking one cornerof the bag where spread apart,

and means for pasting and sealing the end of the bag partially Wheretucked.

5. In a paper bag-making machine, means for feeding a flat bag or tubeforwardly with one longitudinal edge in advance of the body, means fortucking the corner of the advance edge of the bag or tube, means forcreasing the bag or tube parallel to the end thereof, means adapted toapply paste between the creased folds of the bag or tube, and meansadapted to press said pasted folds together. I

6. In a machine for making paper bags, means for feeding a fiatelongated tube with one longitudinal edge disposed at right angles tothe line of travel, means for tucking one corner of the tube inwardbetween the sides of the tube, means for creasing the tube transverselyacross one end thereof, means for applying paste between the creasedportions of thetube, means for applying paste upon the outside of thecreased portion of the tube, and means for pressing the creased pastedportions of the tube together.

7. In a paper bag making machine, a set of conveyors adapted to convey atube edgewise between them, a rotatable tucking device adapted to tuckthe sides of the tube at one edge and corner, a creasing device adaptedto produce a crease transversely at its tucked end, and pasting andfolding devices adapted to seal and close the creased portion of thetube.

8. In a machine for making paper bags, means adapted to convey a fiatpaper tube edgewise, a device adapted to spread the sides of said tubeapart at one end and corner, a device adapted to tuck a corner portionof the tube inwardly where spread apart, a device adapted to produce acrease transversely across said tube at its tucked end, means adapted tospread the tucked tube apart temporarily, a device adapted to applypaste between the tucked creased sides of the tube, a device adapted toapply paste to the outer side and end ofthe tube where ycreased, and adevice adapted to fold the creased and pasted end portions of the tubeback upon itself.

9. In a paper bag machine, a pair of conveyers adapted to feed a flatpaper tube with a longitudinally folded edge in advance of the body ofthe tube, pneumatic means adapted to spread one endof the tubeapart, adevice adapted to tuck one corner of the tube inward between the sidesof the tube, a member adapted to crease the tube transversely, pneumaticmeans adapted to open the creased or tucked portion of the tube, apasting device adapted to project into the open end of the tube, a pasteapplying wheel adapted to engage the top side of the end of the tube,and means adapted to fold and press the creased and pasted end of thetube shut. i

10. In a paper bag machine, means for feeding a flat paper tubeforwardly, a tucking device adapted to fold one corner of the tubeinwardly, and an oscillatory paste ap-' plying device adapted to enterthe tucked corner portion of said tube.

Signed at Cleveland, in the county of Cuyahoga, and State of Ohio, this11th day of June, 1919.

MAXWELL c. ROSE.

